<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>

<body>
    <div id="app">
        <h1>{{message}}</h1>
    </div>
    <script src="./vue.js"></script>

    <script>
        var vm = new Vue({
            el: '#app',
            data: {
                message: 'Vue的生命周期'
            },
            beforeCreate: function() {
                console.group('------beforeCreate创建前状态------');
                console.log("%c%s", "color:red", "el     : " + this.$el); //undefined
                console.log("%c%s", "color:red", "data   : " + this.$data); //undefined 
                console.log("%c%s", "color:red", "message: " + this.message)
            },
            created: function() {
                console.group('------created创建完毕状态------');
                console.log("%c%s", "color:red", "el     : " + this.$el); //undefined
                console.log("%c%s", "color:red", "data   : " + this.$data); //已被初始化 
                console.log("%c%s", "color:red", "message: " + this.message); //已被初始化
            },
            beforeMount: function() {
                console.group('------beforeMount挂载前状态------');
                console.log("%c%s", "color:red", "el     : " + (this.$el)); //已被初始化
                console.log(this.$el);
                console.log("%c%s", "color:red", "data   : " + this.$data); //已被初始化  
                console.log("%c%s", "color:red", "message: " + this.message); //已被初始化  
            },
            mounted: function() {
                console.group('------mounted 挂载结束状态------');
                console.log("%c%s", "color:red", "el     : " + this.$el); //已被初始化
                console.log(this.$el);
                console.log("%c%s", "color:red", "data   : " + this.$data); //已被初始化
                console.log("%c%s", "color:red", "message: " + this.message); //已被初始化 
            },
            beforeUpdate: function() {
                console.group('beforeUpdate 更新前状态===============》');
                console.log("%c%s", "color:red", "el     : " + this.$el);
                console.log(this.$el);
                console.log("%c%s", "color:red", "data   : " + this.$data);
                console.log("%c%s", "color:red", "message: " + this.message);
            },
            updated: function() {
                console.group('updated 更新完成状态===============》');
                console.log("%c%s", "color:red", "el     : " + this.$el);
                console.log(this.$el);
                console.log("%c%s", "color:red", "data   : " + this.$data);
                console.log("%c%s", "color:red", "message: " + this.message);
            },
            beforeDestroy: function() {
                console.group('beforeDestroy 销毁前状态===============》');
                console.log("%c%s", "color:red", "el     : " + this.$el);
                console.log(this.$el);
                console.log("%c%s", "color:red", "data   : " + this.$data);
                console.log("%c%s", "color:red", "message: " + this.message);
            },
            destroyed: function() {
                console.group('destroyed 销毁完成状态===============》');
                console.log("%c%s", "color:red", "el     : " + this.$el);
                console.log(this.$el);
                console.log("%c%s", "color:red", "data   : " + this.$data);
                console.log("%c%s", "color:red", "message: " + this.message)
            }
        })
    </script>

</body>

</html>